Antifreeze compound



UNITED Patented Jan. 7, l3

Eur OFFICE VERNON w. Haas, HARRY ii. JBIGLER, AND IVAN L. HAAG, orCHICAGO, rLLINoIs ANTIFREEZE COMPOUND No Drawing.

The present inventionhasto do with a mixture intended for coolingpurposes, such as the liquid used in the cooling system of an explosionor gasoline engine and the process for the production of such a liquid.

Motor in the winter in cold climates has heretofore been accompanied byserious disadvantages incident to preventing water or other materialused as a medium in the cool- 10 ing system of the engine from freezing,or

from becoming overheated as a result of precautions taken againstfreezing. Until the present invention, there has been no whollysatisfactory anti-freeze liquid for use. in automobiles.

Dilute alcoholic solutions in the water pumping system of an enginehavebeen unsatisfactory because of the rapid volatilizaseveral"disadvantages, however, to the em ployment, of glycerine. In the firstplace, success may be had only when a highper centum of glycerine isused. The'practice now generally followed is to employ solutions havingfifty percent or more glycerine. Glycerine at the present time is highlyexpensive, and'has been recently removed from the open market in severalcities-as a result 0 of commercial conditions incident to largeconsumption in anti-freeze compounds. A second disadvantage in theemployment of glycerine is that at about 15 degrees below zero,Fahrenheit, a solution of glycerine and water, in which as much as fiftypercent of glycerine is employed, will become slush and is thenunsatisfactory.

The ideal anti-freeze compound should comprise a liquid which willretain its fluidity at a temperature of 25 or 30 degrees minus,

'vention was conceived.

Application filed November 27, 1925. Serial No. 71,785.

Fahrenheit, and which can be produced at considerable less expense thana fifty percent solution of glycerine, and which does not possess thevolatility of alcohol or a volatility greater than water. A solutionwhich will last an entire winter on a single filling is highlydesirable.

All of these features are secured in the solution forming the subjectmatter of this application for patent and which solution will now bedescribed. It is for the purpose of attaining these'objects that thepresent in- For producing the solution here described, a glucose havinga specific gravity of fortyfive (45) degrees Baum is procured. Thisglucose commercially is a corn syrup containing approximatelythirty-eight percent (38%) glucose, thirty-eight percent (38%) dextrose,and the remainder water.

Glucose of the character described is heated to substantially twohundred twelve (212) 7 degrees Fahrenheit. The'heat maybe applied to theglucose in an open vessel, but

preferably, a steam acketed vessel should be employed. To thisingredient is added one third of the volume of'water which is t-o'beused in the preparation of the whole solution and which latter amount isgenerally the same weight as. the glucose.

The glucose when heated will readily dissolve in this volume of water,and the glucose and water solution is then mixed with the remainder ofthe water to be used and which may be added cold or hot as desired,after which the required ,volume of glycerine is incorporated;

The glycerine to be employed is commercial glycerine, ordinarily knownin the market as yellow distilled) For temperatures which do not fallbelow twenty-five (25) degrees below zero, Fahren heit,theproper-proportions of the ingredients described are equal parts of eachby weight.

For colder climates, the proportion of water is reduced and that ofglycerine and glucose is correspondingly increased. In warmer belts orzones, the volume of water is increased which correspondingly reducesthe weight of glycerine and glucose employed.

The mixture, after complete solution of the several ingredients, isplaced in the water circulatory or cooling system of a gasoline engineor other device, such system or device 5 first being drained of all ofits contents. For the purpose of preventing leakages at the joints, hoseconnections should be renewed if in bad condition or, if in goodcondition, a quantity of shellac should be applied about the joints toprevent leakage. The solution placed in a system in the fall may he usedfor the entire cold season, for the solution is non-volatile except asto the water and will not decompose or otherwise become useless. It maybe Withdrawn at the approach of warmer Weather to be stored for the nextcold season. Should evaporation occur, water is added to maintain auniformity of strength. The glycerine and glucose do not volatilize. Byreplacinga large proportion of the glycerine as now used in anti-freezesolutions with glucose, a great proportion of the cost is saved, but atthe same time, the 'elliciency of the solution is increased. The presentin- 35 vention results in a solution which does not become slushy attwenty-five degrees minus, Fahrenheit, as a. fiftv (50) percent solutionof glycerine does. In physical characteristics, the present solutionresembles a glycerine solution, there being some dilierence, however, inthe specific gravity.

We claim An anti-freeze mixture consisting of water, glycerine, andglucose, said ingredients being 36 in substantially equal proportions byWeigl 1t.

VERNON W. HAAG. HARRY E. BIGLER. IVAN L. HAAG.

